◆ CIRCUITS & CHIPS, DECODED FOR THE AI ERA 10 FREE CALCULATORS NO LOGIN · NO ADS · NO TRACKING BUILT FOR EE STUDENTS WORLDWIDE v0.1 LIVE
◆ CIRCUITS & CHIPS, DECODED FOR THE AI ERA 10 FREE CALCULATORS NO LOGIN · NO ADS · NO TRACKING BUILT FOR EE STUDENTS WORLDWIDE v0.1 LIVE
← home
/ the toolbox

All calculators

Ten interactive calculators for the most common circuit math. Every one runs entirely in your browser — no signup, no API call, no data leaves your device.

→ 01 · FUNDAMENTALS
Ohm's Law
Solve for V, I, R, or P given any two values. The first formula every EE learns.
→ 02 · COMPONENTS
Resistor color code
Decode 4-band resistors with an interactive visual model.
→ 03 · ANALOG
Voltage divider
Find Vout from Vin, R1, R2. Live schematic and loading-effect warning.
→ 04 · ANALOG
LED current limiter
Pick the right resistor for any LED. Standard E12 values suggested.
→ 05 · ANALOG
RC time constant
τ = RC. Charging and discharging curves visualized live.
→ 06 · ANALOG
Op-amp gain
Inverting and non-inverting configurations side by side.
→ 07 · DIGITAL
555 timer
Astable and monostable frequency from R1, R2, and C.
→ 08 · COMPONENTS
Parallel / series
Combine up to 10 resistors or capacitors in any configuration.
→ 09 · SIGNALS
Decibel converter
dB ↔ ratio for voltage, power, and field quantities.
→ 10 · UTILITIES
SI unit converter
SI prefixes from femto to tera. No decimal-point disasters.